Owners of iPhone 17 handsets will not be able to use the full suite of iOS 27 features when the update ships this fall. And it’s that mode’s lower 8GB of RAM that is to blame.
When Apple announced the iOS 27 update during its WWDC opening keynote on June 8, the company confirmed that Siri AI’s new Siri voices and improved systemwide dictation would not come to the iPhone 17.

Instead, it’s only available on the iPhone Air, iPhone 17 Pro, and iPhone 17 Pro Max. Apple’s iPads with an M4 chip or later, and Macs with an M3 or later, are also on board, as is the M5 Apple Vision Pro.
This is because the new features require at least 12GB of RAM in order to function, leaving the iPhone 17 out in the cold. As MacRumors notes, that means that two notable features won’t be available to iPhone 17 owners.
On the voice side, users can adjust the expressiveness and pace of Siri’s speech so that the assistant sounds the way they want it. However, it’s the dictation feature that includes the more substantial change. Apple’s most advanced on-device AI model is said to be able to turn speech into polished text on the fly, handling capitalization, punctuation, and formatting automatically, with improved speech understanding that’s meant to cut down on errors.

All other Siri AI features will work on the iPhone 17 just fine. In fact, the iPhone 15 Pro, iPhone 16 Pro Max, and the entire iPhone 16 series will also support all other Siri AI features.
You may also like to check out:
- Download iOS 27 Beta 1 IPSW Links For Developers Now
- iOS 27 Beta 1 OTA Profile Update Download: Here’s How To Install It
- iOS 27 Public Beta 1 OTA Release Date Set For Next Month Alongside iPadOS 27, macOS 27
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